Trailer Maintenance.
Because trailers and caravans spend much of their time stuck in the corner of a garden totally forgotten they should be thoroughly checked before each season. The following is not a definitive list but it should help in preventing most roadside disasters.
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Brakes. If the trailer is to be left for anything more than a few days do not use the parking brake, because when you try to move it the chances are very high that the brakes will have seized on. Generally lubricate all bowden cables (WD40 is ideal) grease fulcrum points and any exposed cables at least once per year. Also remove brake drums, clean, lubricate, reassemble and adjust. Make sure that the wheel nuts run freely on their threads.
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Overrun Couplings. Check for tightness, grease ball and slide tube. Check that neither the ball or coupling are excessively worn. Check that the coupling moves in and out. (Some resistance should be felt) Make sure that the gaiter is not torn.
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Wheels and tyres. Perished tyres are a problem. Check for cracking around the side walls. Check tyre pressures, spin the wheels and listen for bearing noise. Also check for play. Boat trailers can suffer because of the sea water. Bearings should be properly lubricated. Tyres have a load and a speed rating make sure that it is sufficient for the load carried. Any tyre company should be able to advise.
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Jockey wheel. Depending on the number of times it has dragged on the road you may need to replace it. Make sure that it winds up and down properly and clamps without slipping.
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Chassis. Not corroded away, no loose bits, not twisted. If yes to any then rectify.
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Axles and suspension. Rubber suspension is maintenance free but visually check for accident damage. Leaf springs check for breakage and wear of associated parts.
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Electrics and reflectors. Make sure everything works, and that reflectors and lenses are not broken or missing
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Make sure the correct number plate is fitted.
